Clutch



July 1 1924,

CLUTCH 4 Sheets-Sheet 2 May 3922 July 1 1924.

,y 1,499,652 S. P. GRIFFIN i CLUTCH- Filed May 19, 3922 4 Sheets-Sheet 3 yH9914. F/a.

num 1 Toi:

5 FiCfr/fF//w Patented July 1, 1924.

SAMUEL Il.v GRIFFIN, OF NORTE JUDSON, INDIANA.

CLUTCH.

Application led May 19, 1922. Serial No. 562,163.

To all whom z't may concern. p

Be it known that I, SAMUEL P.'GRIFF1N,

a citizen of the United States, residing at North Judson, in the county of Starke and State of Indiana, have invented certain new and useful Improvements in Clutches; and I do hereby declare the following to be. a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to clutches, and aims to provide a novel and improved clutch device adapted especially for use in capstans of the kind disclosed in my Patent No. 1,372,019, granted March 22, 1921, and in the co-pending application, Serial No. 487,- 793, filed July 26, 1921, although the iinprovements can be used for other ap- .propriate purposes also.

It is an object of the invention to provide a clutch having novel and effective means for causing the clutch members to tightly frictionally grip one another, using a toggle action to obtain the desired results.

Another object is the provision of a novel and improved toggle arrangement in the clutch for obtaining a powerful frictional gri between the clutch members.

further object is the provision of a novel means for latching the clutch members together for rotation one with the other without possibility of slippage.

A still further object is the provision of a novel operative connection between one clutch member and the operating member.

With the foregoing and other objects in view, which will be apparent as the description proceeds, the invention resides inthe construction and arrangement of parts, as hereinafter described and claimed, it being understood that changes can be made within the scope of what is claimed, without departing from the spirit of the invention.

The invention'is illustrated in the accompanying drawings, wherein- Figure 1 is avertical section of a capstan embodying the improved clutch device, portions being shown in elevation.

Fig. 1a is a cross section on the line 1'1--1a of Fig. 1.

Fig. 2 is an enlarged horizontal section on the line 2-2 of Fig. 1, portions being b roken away.

Fig. 3 is a vertical section on the line 3-3' oi Fig. 2.

ment.

Figs. 4, 5, 6 and 7 are sectional showing different modifications.

Fig. 8 is a fragmentary vertical section of another type of capstan showing a modified form of clutch at the bottom of the drum. y

Fig. 9 is a sectional detail showing a further variation.

Fig. 10 is a sectional detail of another modification.

The improvements, as illustrated in the drawings are especially adapted for use in capstans, although they can be used in other devices or appliances, for which the'improvements are suitable.

Fig. 1 illustrates a capstan of the general kind shown in Patent No. 1,372,019, embodying a suitable base or frame 14 'having the upstanding spindle 15 on which the drum or spool 16 ismounted for rotation for winding a cable thereon. y rThis drum is provided at the top, above the upper rim of the drum, with' an annular inclined or flared flange 17 providing a conical clutch socket. A clutch member lor disk 18 is mounted for rotation on the spindle 15 above the drum, and is provided with a depending annular flange or rim 19, which is inclined or bevelled t'o provide a conicalperiphery to correspond with and fit the companion clutch member or flange 17 within which the ange 19 is disposed. The confronting surfaces of the Hanges may have frictional facings to assure their frictional engagedetails dle 15. The hub 2() is provided at its up.

per end with an inturned iiange 21'slidably fitting the upper reduced portion or-stem 22 of the spindle, and a coiled spring 24 surrounds said stem22 and is confine-d between the fiange 21 and the shoulder 23 of the spindle 15 within the hub 20, thereby exerting an effort to raise the clutch member 18 and open the clutch. A nut 25 is screwthreaded on the stem 22 of the spindle above the hub 20, and provides the operating member for the clutch, said nut being preferably the hub of a hand wheel 26,

which can be conveniently rotated for controlling the clutch. A swivel connection is i provided -between the nut or hub 25 and the hub 20 yof the clutch member 18, and includes a coupling member or sleeve 27 fitted .the rotation of the sleeve 27, but to permit it to slide longitudinally of the stem. The

A upper and lower end portions of the sleeve have sockets or recesses 34 receiving the adjacent end portions of the hubs 20 and 25, andsaid sleeve has annular grooves surrounding said sockets in which outstanding annular danges or ribs 36 of the hubs 20 and 25 are fitted, thereby swivelling the hubs in the sleeve or member 27, and connecting the parts for simultaneous movement longitudinally of the spindle. lin this way, the operating member or wheel 26 and clutch member 18 are both assembled with the coupling sleeve or member 27 by swivel connections. Une section 28 of the sleeve 27 has an outstanding bracket 33 to which a seat for the operator can be secured, as disclosed in the (zo-pending application Serial No. 487,793. The clutch member 18 is rotated in any suitable manner. As shown, a pole or swee 37 is connected to the clutch member 18' or' turning it.

.Ki-The clutch member 18 is provided with shoes 40 to rictionally engage the clutch member 17 under radial pressure. As shown more in' detail in Figs. 2 and 3, the shoes 40 are fitted for sliding movement in openings 41 in the rim or dange 19. Said shoes are'rotatable with the clutch member 18 but are 'slidable=-radially thereof and longitudinallyof the-axis oit the clutch. Said shoes have their faces projecting from the periphery of the clutch member 1 8 to contact with the face of the clutch member 17 before the are moved together. Thus, a toggle link 44 is disposed between each shoe 40 andthe hub 20v of the clutch member 18, and such link, as shown in Figs. 1, 2 and 3, is composed of thetubular section 45 into which the other section 46 is screw-threaded, for purposes of adjustment, to change the length' neeaeea and a retainer 52 is secured to the shoe The ball 48 of each link 44 seatsI around the ball, to hold the link and shoe assembled with a ball and socket joint, permitting the link and shoe to swing and turn relatively. A band 53 embraces the hub 20 below the member 18, and is split and has the outstanding ears 54 at its ends through which a bolt 55 engages, for clamping said band securely in place. 'lhe band 53 has sockets 56 receiving the balls 47, and retainers 57 are secured to said band around the balls to provide' ball and socket connections between the links 44 and the band.

The inner ends or balls 47 of the toggle links 44, when the clutch Y the plane of the outer ends or balls 48 of is open, are above the links, and the clutch member 18 being raised, results in the springs 43 moving the shoes 40 downwardlyto releasing position. When the clutch member 18 is forced downwardly, by the rotation of the nut or hub 25 of the wheel '26, the shoes '40 in `contacting with the clutch member 17 will be stopped in their downward movement, and the pressure on the inner ends oil the links 44 will move said inner ends of the links downwardly or toward the plane ot the outer ends of the links, thereby creating a toggleaction, and forcing the toggle links radially outward with considerable pressure. lhis will force the shoes 40 under high outward pressure or thrust against the clutch member 17, whereby the shoes grip said clutch member in a powerful manner, to prevent slipping. `When the pressure is relieved, by raising the clutch member 18, the inner ends ot the links beinV raised, willenable the shoes 41 to yiel inwardly, and the s rings 43 will move the shoes 40 downward y away from the clutch member 18, so that the clutch members are disengaged. The friction grip can be regulated, by adjusting the lengths of the toggle links 44, to take up wear on the shoes 40, or to adjust the pressure of the shoes against the outer' clutch member.

A latching deviceis provided for latching the two clutch members together for rotation one with the other, and includes a latch` 60 slidable radiallyof the clutch member 18 in the rim or flange 19 there of and inl a depending guidev 61 secured to said clutch member. The clutch member iisg 60 The inner end of the link is fined between the guide 61 and a collar 64 secured on the latch, whereby to project the latch when it is released. A stop-pin 65 carried by the latch is adapted to contact with the guide 61, to limit the outward movement of the latch. The latch is retracted b means of a cam 66 disposed above the late between the latch and clutch member 18 adjacent to the rim 19, and said cam has -an upstanding stud 67 projecting through the clutch member and mounting 20 for turning the cam. When the cam is turned in one direction, it contacts with the collar 64 and forces the latch inwardly to retracted position, and holds it in this position, as seen in Figs. 2 and 3. When the cam is turned in the opposite directlon, the

latch is released and the spring 63 will project it against the clutch member 17, said latch springing or snapping into the slot 62 when the latch and slot register, thereby -causing both' clutch members to tum one with the other, without any liability of slippage occurring.

Figure 4 shows another means for connecting the links 441 with the clutch member 181 when the hub 201 does not ex# tend below the clutch member. The ball 471 of the link 441 is fitted-in a socket 561 of al rigid hanger or depending bracket 531 which is clamped up against the clutch member, by the bolt 551. The ball 471 is held in the socket 561 by a retainer 571. Each link can thus be connected by a ball Land socket connection with the clutch member by an individual hanger or bracket 531, instead of using the clamp band 53 as in Figs. 1,2and 3.

Fig. 5 shows` another modification. The link 442 is composed of the tubular section 452 and section 462 threaded into said tubular section, and the outer end portion of the link is pivoted by a pin 522 to an ear or lug 512 of the shoe 402 which slides in the opening 412 of the clutch member 182 to contact with the outer clutch member 172. Stop lugs 422 are secured to the inner side of the shoe, to limit the outward movement of the shoe, and a spring 432 is disposed between the clutch member and shoe as in the first form of clutch. pivoted by a in 572 to an ear 532 projectmg from the ower portion of the hub 202. The end portions of the link 'have the openings 472 and 482, respectively, extending diametrically. therethrough 1n different directions,

for receiving the pivot pins. When the pins are removed, the Vsections of the link 442 can-be rotated relatively for the pur pose of adjusting the length of the link, and when the pivot pins are inserted, this will not only pivotally connect the link with the clutch member and shoe, but will also prevent accidental adjustment of the link.

Fig. 6 shows the link 443- connected by a similar pivot pin 573 withv a depending bearing 533 havingA a stem 553 secured through and clamped to the clutch member 183. The end of the link 443 has the openin s 473 for receiving the pin 573.

ig. 7 shows the rim or fiange 194 of the clutchr member 184 and the clutch member or ange 174 of cylindrical form, instead of being tapered or conical. rlhe clutch shoe 404 is fitted4 for vertical and radial sliding movement in the slot or opening 414, and is depressed by a spring 434 between the shoe and clutch member 184, the shoe having the stop flanges or lugs 424 to contact with the inner periphery of the rim 194. The link 444 composed of the screw-threadedly connected sections 454 and 464 has its outer end connected by a pivot pin 524 with the shoe, and its inner end portion is connected by a pivot pin 574 with a depending bearing 534 secured to the clutch member 184 in substantially the same manner as shown in Fig: 6. The-section 464 has the openings ,474 to receive the pivot 574, so that when the pivot pin is removed, the section 464 can be turned for adjusting the length` of 4the link. When using the cylindrical confronting surfaces of the clutch members, the outer clutch member 174 is provided with a shoulder 70 for the contact of the shoe or shoes 404, when the clutch members are moved together, so that the shoes will be stopped while the clutch member 184 continues to move, for creating the outward thrust on the shoe.

Fig. 8 illustrates the clutchembodied in a capstan of the kind shown in co-pending application Serial No. 487,793, wherein the clutch member 185 is located at the bottom of thedrum 165. The rim or flange 195 of the clutch member is located within the lower portion of the drum, r,which has the tapered or conical clutch portion or member 175 to correspond with the tapered or conical'rim 195 of the clutch member 185. The shoe 405 is movable in the opening 415 of the rim 195, and has the stop iange or flanges 425 tol contact with the vinner periphery of said rim. A coiled spring 435 is disposed between the shoe and spring seat 435 carried by the rim 195 below the shoe, whereby the shoe is raised when released. A toggle link 445 4is pivotall connected lat its outer endA to the shoe an at its inner end to the hub 205 of the clutch member 185, in substantially the same manner as suggested in 11`ig. 5, excepting that the link is lowei` at its inner end than its outer end, just reversed to the arrangements hereinbefore described. r1`he hub 205 rotates around an upstanding sleeve 71 rising from the base 145. 1n this arrangement, the drum 165 is raised and lowered for opening and closing the clutch, respectively, and when the drum is forced downwardly, the clutch portion 175 thereof contacts with the shoe or shoes 405 and moves the same downwardly, whereby the 4downward swinging movement of the link"445 will provide the toggle action for thrusting the shoe outwardly to tightly grip the clutch portion 175. The action is sub.- stantially the same as hereinbefore described, excepting that the outer clutch member is moved instead of the inner clutch member.

Fig. 9 illustrates the rim 196 of the inner clutch member and the clutch portion 17 6 of the drum as being cylindrical, and the clutch portion 176 is provided with an inner shoulder 706 to contact with the shoe 406, which is necessary to cause the shoe to move with the clutch portion 176, when the clutch members are not tapered or conical. The

shoe 406 .is raised by the spring 436, and,

as shown the link 446 has a ball47 6 fitted in a socket in the shoe, to provide a ball and socket connection.

Fig. 10 shows the springs 437 between the shoe 407`and upper edge of the opening naeaeee A clutch device comprising a rotary member having an annular Harige, a rotary disk having an annular ange within the aforesaid Hange and provided with openings,l

shoes slidably mounted in said openings for movement toward and away romthe disk and for movement toward and away from the center of the disk, said shoes having portions to hear against `the inner surface of the second named flange for limiting the outward movement of said shoes, toggle link connections between said shoes and disk to force the shoes into engagement with the first-named Bange when the flanges' are moved together, and spring means for urging the shoes toward said member in said openings.

lin testimony vwhereof ll have signed my name to this specification in the presence oi two subscribing witnesses.

SAMUEL r. enirrinj Witnesses Cms. RUEIL, CHRISTINE KozA. 

